Bsi bs en 60534 1 2005

Unknown BRITISH STANDARD BS EN 60534 1 2005 Incorporating Corrigendum No 1 Industrial process control valves — Part 1 Control valve terminology and general considerations The European Standard EN 6053[.]

Industrial-process

control valves —

Part 1: Control valve terminology and

general considerations

The European Standard EN 60534-1:2005 has the status of a

British Standard

ICS 23.060.40; 25.040.40

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This British Standard was

published under the authority

of the Standards Policy and

Strategy Committee

on 31 March 2005

© BSI 19 April 2005

ISBN 0 580 45696 X

National foreword

This British Standard is the official English language version

of EN 60534-1:2005 It is identical with IEC 60534-1:2005 It supersedes

BS EN 60534-1:1993, which is withdrawn

The UK participation in its preparation was entrusted by Technical Committee GEL/65, Measurement and control, to Subcommittee GEL/65/2, Elements of systems, which has the responsibility to:

A list of organizations represented on this subcommittee can be obtained on request to its secretary

Cross-references

The British Standards which implement international or European

publications referred to in this document may be found in the BSI Catalogue

under the section entitled “International Standards Correspondence Index”,

or by using the “Search” facility of the BSI Electronic Catalogue or of

British Standards Online

This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

— aid enquirers to understand the text;

— present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the

UK interests informed;

— monitor related international and European developments and promulgate them in the UK

Summary of pages

This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover

The BSI copyright notice displayed in this document indicates when the document was last issued

Amendments issued since publication

15662 Corrigendum No 1 19 April 2005 Correction to supersession details

EUROPÄISCHE NORM February 2005

CENELEC

European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members

Ref No EN 60534-1:2005 E

ICS 23.060.40; 25.040.40 Supersedes EN 60534-1:1993

English version

Industrial-process control valves Part 1: Control valve terminology and general considerations

(IEC 60534-1:2005)

Vannes de régulation des processus

industriels

Partie 1: Terminologie des vannes

de régulation et considérations générales

(CEI 60534-1:2005)

Stellventile für die Prozessregelung Teil 1: Begriffe und allgemeine Betrachtungen

(IEC 60534-1:2005)

This European Standard was approved by CENELEC on 2005-02-01 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member

This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

Foreword

The text of document 65B/543/FDIS, future edition 3 of IEC 60534-1, prepared by SC 65B, Devices, of IEC TC 65, Industrial-process measurement and control, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60534-1 on 2005-02-01

This European Standard supersedes EN 60534-1:1993

The main changes with respect to EN 60534-1:1993 are an update of the definitions given in

EN 60534-1 in order to harmonize them with current terminology

The following dates were fixed:

– latest date by which the EN has to be implemented

at national level by publication of an identical

– latest date by which the national standards conflicting

Annex ZA has been added by CENELEC

Endorsement notice

The text of the International Standard IEC 60534-1:2005 was approved by CENELEC as a European Standard without any modification

In the official version, for Bibliography, the following note has to be added for the standard indicated:

ISO 6708 NOTE Harmonized as EN ISO 6708:1995 (not modified)

CONTENTS

EROF DROW 5

1 Scope 4

2 Normative references 4

3 Component terminology 4

4 Functional terminology 7

5 Testing requirements 11

5.1 Production testing 11

5.2 Type testing 11

6 Prediction methods 11

6.1 Valve sizing 11

6.2 Noise levels 11

Bibliography 13

Annex ZA (normative) Normative references to international publications with their corresponding European publications 12

INDUSTRIAL-PROCESS CONTROL VALVES –

Part 1: Control valve terminology and general considerations

1 Scope

This part of IEC 60534 applies to all types of industrial-process control valves (hereinafter referred to as control valves) This part establishes a partial basic terminology list and provides guidance on the use of all other parts of IEC 60534

The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition

of the referenced document (including any amendments) applies

IEC 60534 (all parts), Industrial-process control valves

3 Component terminology

3.1

control valve

power-operated device which changes the fluid flow rate in a process control system It consists of a valve connected to an actuator that is capable of changing the position of a closure member in the valve in response to a signal from the controlling system

3.1.1

control valve with a linear motion closure member

3.1.1.1

diaphragm valve

valve in which a flexible closure member isolates the line fluid from the actuating mechanism and provides a seal to the atmosphere

3.1.1.2

gate valve

valve whose closure member is a flat gate that moves in a direction parallel to the plane of the seat

3.1.1.3

globe (angle) valve

valve in which the closure member moves in a direction perpendicular to the plane of the seat(s)

control valve with a rotary motion closure member

3.1.2.1

ball valve

valve with a closure member that is a sphere with an internal passage The centre of the

spherical surface is coincident with the axis of the shaft

3.1.2.2

segmented ball valve

valve with a closure member that is a segment of a sphere The centre of the spherical

surface is coincident with the axis of the shaft

3.1.2.3

butterfly valve

valve with a circular body and a rotary motion disk closure member, pivotally supported by its

shaft The shaft and/or closure member may be centred or offset

3.1.2.4

plug valve

valve with a closure member that is cylindrical or conical, with an internal passage

3.1.2.5

eccentric plug valve

valve with an eccentric closure member that may be in the shape of a spherical or conical

segment

3.2

valve

assembly forming a pressure retaining envelope containing a closure member for changing

the flow rate of the process fluid

3.2.1

valve body

part of the valve which is the main pressure retaining boundary It provides the fluid-flow

passageways and the pipe-connecting ends

3.2.2

bonnet

portion of the valve which closes an opening in the body and through which passes the stem

connecting the closure member to the actuator

3.2.3

end connection

valve body configuration provided to make a pressure tight joint to the pipe carrying the fluid

to be controlled

3.2.3.1

flanged ends

end connections incorporating flanges which allow pressure seals by mating with

corres-ponding flanges on the piping

3.2.3.2

flangeless ends

end connections where no flanges are incorporated on the valve body Valve body ends

incorporate facings which mate with corresponding facings on flanges attached to the

connecting piping Installation is accomplished by clamping the valve between the pipe

flanges

3.2.3.3

threaded ends

end connections incorporating threads, either male or female

3.2.3.4

welded ends

end connections where valve body ends have been prepared for welding to the line pipe or other fittings Such connections may be of the butt-weld or socket-weld types

3.2.4

valve trim

functional components of the valve, excluding the body, bonnet and blind head (if present), which are in contact with the fluid

3.2.4.1

valve seats

corresponding sealing surfaces within a control valve which make full contact when the control valve is in the closed position

3.2.4.2

seat ring

part assembled in the valve body to provide a removable valve seat

3.2.4.3

closure member

movable part of the valve which is positioned in the flow path to restrict the flow through the valve A closure member may be a plug, ball, disk, vane, gate, diaphragm, etc

3.2.4.4

valve stem (or shaft)

component extending through the bonnet which connects the actuator to, and positions, the closure member For rotary valves, the word shaft should be used in place of stem

3.3

actuator

device or mechanism which transforms a signal into a corresponding movement controlling the position of the internal regulating mechanism (closure member) of the control valve The signal or energizing force may be pneumatic, electric, hydraulic, or any combination thereof

3.3.1

actuator power unit

that part of the actuator which coverts fluid, electrical, thermal or mechanical energy into actuator stem motion to develop thrust or torque

3.3.2

yoke

structure which rigidly connects the actuator power unit to the valve It can be an integral part

of the bonnet or actuator

3.3.3

actuator stem

component which transmits motion from the actuator power unit to the valve stem (or shaft)

fitting

any device such as a reducer, expander, elbow, T-piece, or bend which is either

close-coupled or attached direct to an end connection of a control valve

4.1

nominal size

DN

alphanumeric designation of size for components of a pipework system, which is used for

reference purposes It comprises the letters DN followed by a dimensionless whole number

which is related direct to physical size, in millimetres, of the bore or outside diameter of the

end connections

NOTE 1 It is designated by the letters DN followed by a number from the following series: 10; 15; 20; 25; 32; 40;

50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; etc

NOTE 2 The number following the letters DN does not represent a measurable value and should not be used for

calculation purposes except where specified in the relevant standard

NOTE 3 The definition of nominal size is in accordance with ISO 6708

4.2

nominal pressure

PN

numerical designation which is a convenient rounded number for reference purposes All

equipment of the same nominal size (DN) designated by the same PN number shall have

compatible mating dimensions

NOTE 1 The maximum allowable pressure depends upon materials, design and working temperatures and should

be selected from the pressure/temperature rating tables in the appropriate standards

NOTE 2 It is designated by the letters PN followed by the appropriate reference number from the following series:

2,5; 6; 10; 16; 20; 25; 40; 50; etc (see ISO 7268 and EN 61333)

NOTE 3 The definition of nominal pressure is in accordance with ISO 7268

4.3

NPS

numeric designation of size for components of a pipework system, which is used for reference

purposes It comprises the letters NPS followed by a dimensionless number NPS is related to

nominal size DN as follows:

NOTE For NPS greater than 4, the equivalence is DN = 25 times NPS

4.4

class

convenient round number used to designate pressure-temperature ratings

NOTE It is designated by the word Class followed by the appropriate reference number from the following series:

125; 150; 250; 300; 600; 900; 1 500; 2 500

4.5

closure member position

4.5.1

closed position

position of the closure member when a continuous surface or line of contact is established

with the valve seat For non-seating valves, the closed position is obtained when the flow

passageway is minimum

4.5.2

travel

displacement of the closure member from the closed position

4.5.3

rated travel

displacement of the closure member from the closed position to the designated full open

position

4.5.4

relative travel

h

ratio of the travel at a given opening to the rated travel

4.5.5

overtravel

displacement of the actuator stem, or shaft, beyond the closed position For some valve

designs, overtravel may occur as the closure member moves to a mechanical stop position

after full exposure of the flow restricting orifice(s)

4.6

flow coefficient

basic coefficient used to state the flow capacity of a control valve under specified conditions

Flow coefficients in current use are Kv and Cv depending upon the system of units

NOTE 1 It will be noted that the dimensions and units on each of the following defined flow coefficients are

different However, it is possible to relate these flow coefficients numerically This relationship is as follows:

865 , 0 v

v

=

C

K

(1)

NOTE 2 The flow coefficient definitions for Kv and Cv include some units, nomenclature, and temperature values

which are not consistent with other parts of IEC 60534 These inconsistencies are limited to this subclause and are

only used to show the unique relationships traditionally used in the control valve industry These inconsistencies do

not affect the other parts of IEC 60534

4.6.1

flow coefficient

Kv

flow coefficient Kv in cubic metres per hour is a special volumetric flow rate in cubic metres

per hour (capacity) through a valve at a specified travel and in the following conditions:

– the static pressure loss (∆pkv) across the valve is 105 Pa (1 bar),

– the fluid is water within a temperature range of 278 K to 313 K (5 ºC to 40 ºC),

– the unit of the volumetric flow rate is the cubic metre per hour

The value of Kv can be obtained from test results with the help of the following equation:

















∆

∆

=

w

k

v v

ρ

ρ

p

p Q

where

Q is the measured volumetric flow rate in m3/h;

k

p

∆ is the static pressure loss of 105 Pa (see above);